Housing for pulleys.



N0- 893,777; PATEN'TED JULY 21, 1908.

v G. A. BRINLEY. I

HOUSING FOR PULLEYS. APPLI'0 AT.I0-N FILED 11110 24. 1907.

. of Philadelphia,

UNITED sTA Es PATENT OFFICE.

CHARLES A. BRINLEY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE AMERICAN PULLEY COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN- SYLVAN IA.

HOUSING FOR PULLEYS.

Specification of Letters Patent.

Patented July 21, 1908.

To all whom it may concern:

Be it known that I, CHARLEs A. BRINLEY,

in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Housings for Pulleys, whereof the following is a specification, reference being had to the accompanying drawings.

My invention is particularly adapted for use in connection with sash pulleys, and I have therefore illustrated it in connection with a device of this character, although certain features thereof are capable of a more extended use. I

Among the objects of my invention are to permit the use of very light sheet metal for the pulley housing, Without impairing the strength thereof; to afford a highly economical construction both as regards the formation of the various essential parts and their assemblage, and to provide an eficient means for securing the housing in a mortise of a sash frame.

In the drawings, Figure I, represents a side elevation of a housing and pulley embodying my invention in its preferred form. Fig. II, is a top or plan View thereof. Fig. III, is an end view thereof. Fig. IV, is a vertical transverse section through the shortest diameter of the housing on the line IV, IV, of Fig. II. Fig. V, is a horizontal transverse section on the line V, V, of Fig. I. Fig. VI, is a view of the blank from Which the face plate of the housing is constructed. Fig. VII, is a view in perspectiveof one of the housings which are mounted upon the face plate.

Referring to the drawings, 1, represents the pulley member proper, which may be of any type of construction, but which is preferably of sheet metal. The housing consists of the two members 2, and 3, mounted upon the face plate 4, the pulley 1, being mounted between them upon a headed axle 5, in the usual manner.

Referring to the method of constructing the housing, Fig. VI, indicates the blank for the face plate, which is an elongated piece of sheet metal, having rounded ends, as shown, and provided with a central slot 7, extending along the direction of its longest axis; said slot terminating at each end in a circular enlarged opening 8. This blank is stamped from a suitable piece of metal, preferably sheet steel, and thereafter is pressed by means of dies, so as to upset the portion surrounding the slots 7, and 8, into a flange or rim at right angles to the plane of the blank, the upsetting taking place along the dotted line 9, of Fig. VI, so that the opening in the face plate will then be coextensive with the innermost of the two dotted lines. Owing to the configuration of the slots 7, and 8, the flange or rim of upset metal will assume the outline indicated by the dotted lines 10, 11, in Fig. I, the intermediate region 11, having its edge raised somewhat above that of the end regions 10, 10.

The housing is preferably formed of two similar pieces of sheet metal, one of which is shown in Fig. VII. Each of them comprises approximately parallel sides united by a rounded end portion 13, the portions of the sides adjacent to the rounded ends being provided with vertical corrugations 14, extending only part way down from the top of the housing, as shown, the metal below the corrugations being disposed in a plane surface. Beyond these corrugations and on the side nearest the observer in Fig. VII, the metal is given a slight inward bend, in a vertical line as shown at 15, and then extends as a plane surface 16, to the end, or vertical edge, of the piece, the lower region of said plane portion being cut away so as to form a right angled recess, the horizontal edge 17, of which is substantially on a line with the lower ends of the corrugations 14:, and whose vertical edge 18, merges into the vertical depressions 15, above referred to. The other end of the strip beyond the corrugations 14, upon the .opposite side extends therefrom in an unbroken plane surface, as shown at 19, the full vertical hei ht of the housing-piece. Since the other e ement or housing-piece is similar in construction to that just described, it will be observed that as they face in opposite directions, the'recess thereof, will be upon the other side so that the two parts when fitted together with their ends overlapping are arranged as rights and lefts as shown clearly in the plan view of Fig. II. The two housing-pieces, thus fitted together, are secured to one another and'to the flange of the face plate, preferably by the process of electric welding now employed for uniting sheet metal articles, the welding points being indi cated conventionally by the circles 20, of Fig.

I, the practically integral character of metal at these regions being indicated by the sec tional shading at the points 21, in Fig. V.

Pliable barbed projections 26, are formed in vertical alinement at the central region of each of the curved portions 13, so that these barbs will project outwardly and downwardly, directly at the extremities of the housing. The metal of each of the barbs is also punched from within so as to form a small interior cavity or step, the corresponding outward bulge of the metal being indicated at the points 27.

Owing to the limited vertical extent of the corrugations 14, the long diameter of the combined housing-pieces 2, and 3, is slightly less at the top than at the bottom, where they are attached to the face plate, thus producing a slight taper, which, however, is so small that no attempt has been made to indicate it in the drawings, but which facilitates the insertion of the housings into the mortised openings of a sash frame.

Referring now to the structure above described, it will be noted that it possesses certain important characteristics. Thus, at the region of chief strain, where the stud or axle 5, of the pulley is located, there isa double thickness of metal, owing to the overlap of the meeting parts, thus permitting the use of very much thinner sheet metal than has here tofore been employed for pulley housings where at this region there is only a single thickness. The recessing of the bottom portions of the overlapping ends of either side, avoids however, the presence of three thicknesses of metal, where the overlapping ends of the housings are in juxtaposition with the flange 11, of the face plate.

The vertical depression along the line 15, and the prolongation thereof at the vertical edge 15, of the recess, permits the adjacent end portion of the other housing-piece to lie practically flush with the external surface of the metal beyond the overlapping region, thus not only giving a desirable finish to the article, but facilitating its insertion into the mortise opening. The vertical corrugations 14, assist in strengthening the metal at the region where they exist, and since the extent of their lateral projection is not greater than that of the rounded end portions 13 (as shown in Fig. II), they do not interfere with the insertion of the pulley into the ordinary form of mortised opening.

After the housing has been driven into the mortised opening in the usual manner, the barbs 26, can be forced outwards by inserting the end of a punch into the cavity or seat formed on the interior of each barb within the region 27, so as to insure a firm engagement of said barbs with the wood of the frame and securely hold the housing in position, without the application of screws or other fastenings.

I am aware that it is not new to provide a sash pulley housing with integral spring tongues for engagement with the sides of the opening in the sash, but, as heretofore constructed these tongues have necessarily been placed at the sides of the housing instead of directly at the ends thereof, owing to the fact that the structure was divided at the ends instead of across the central region. By the construction above described, and characteristic of this portion of my invention, barbs having sufficient flexibility to permit them to be positively forced outwards, can be located directly at the end portions, where they can obtain the best engagement with the grain of the wood. Furthermore, so far as I am aware, the feature of transverse division of the housing, as distinguished from the longitudinal division thereof, is new in devices of this character, and affords advantages both in regard to the integral character of the structure at the ends of the housing proper, and in regard to the overlapping of such of the meeting parts as may be desired, at the region of strain. This latter feature enables me to employ much thinner metal for the structure as a whole, than would otherwise be permissible.

Having thus described my invention, I claim 1. The combination with a face plate; of a two-part sheet metal housing integral at the ends and divided on each side at the region adjacent to the transverse center, said housing comprising parts which overlap one another on each side at the central region; a pulley; and an axle therefor mounted in the overlapping parts of the housings; substantially as set forth.

2. The combination, with a face plate having a central opening with a raised flange of two sheet-metal housing-pieces having ends which overlap one another at the central region of the housing, the overlapping ends being respectively provided with recesses at the regions adjacent to the flange of the face plate, whereby a double thickness only of metal is provided at the region of the overlap.

3. In a pulley housing, the combination with a face plate; of two sheet metal housing pieces having ends which overlap one another at the central region of the sides of the housing; a pulley; and anaxle therefor mounted in the overlapping portions of the housing pieces, the sides of the housing being provided with vertical corrugations arranged substantially as set forth.

4. In a pulley housing, the combination with a face plate of two sheet metal housing-pieces having ends which overlap one another at the central region of the sides of the housing a pulley, an axle therefor mounted in the overla ping portions of the housing-pieces; and p iable barbs located directly at the longitudinal extremities of the housing.

5. In a pulley housing, the combination With a face plate; of two sheet metal hous- 5 ing-pieces having ends which overlap one another at the central region of the sides of the housing; a pulley; an axle therefor mounted in the overla ping portions of the housing pieces; and piable barbs located 10 directly at the longitudinal extremities of the housing, said barbs being provided With internal depressions, substantially as and for the purpose specified.

In testimony whereof, I have hereunto signed my name, at Philadelphia, Pennsyl- 15 Vania, this twenty -first day'of December 1907.

CHARLES A. BRINLEY.

Witnesses:

OHARLEs E. BRINLEY, JAMES H. BELL. 

